Bank grader



2 Sheets-Sheet 1 w. LEHMAN BANK GRADER Filed May 9, 1930 Q Q Q Oct. 11, 1932.

ATTORNEYS.

Oct. 11, 1932. LEHMAN 882,079

BANK GRADER Filed May 9. 1930 2 Sheets-Sheet 2 7/(h7zvr Zdmaw,

IN V EN TOR.

A TTORNEYS.

Patented Oct. 11, 1932 tan 1;

WERNER LE'HMAN, OF SOUTH MILWAUKEE, 'WISObNSIIT, ASSIGNOE T0 BUGYR'U'S-EBIE CGMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPGB-ATIOH OF DELAWARE BANK GRADER Application filed May 9, 1930. Serial No. 450,987. 2

My invention relates to new and usefu improvements in bank graders. V

My invention is primarily designed for use in connection with Mississippi River flood prevention work, in which it is necessary to grade the banks to a long and rather gentle slope, extending this slope below the water line, and covering it with concrete slabs, which are laid like clapboards, with the overlying edges down-stream.

Heretofore it has been possible to grade only above the water line, and hence only at low water. The principal object of my invention is to provide a bank grader which can be used accurately under water, and hence at all times. This I accomplish by means of a gauge on the boom, and by setting the boom to the slope of the desired bank, and by holding my graderat a fixed distance from the bank. Hence I do not have to see into the muddy water, and can use my grader at all times.

My invention is an improvement over U. S. Patent lid-8,981, to myself and Ballentine and Dahlgren, dated February 25, 1930, for

bank grader, and more particularly over the pontoons of that patent. V

In addition to my principal object, I have worked out a number of novel and useful de-' tails, which will be readily evident as the description progresses. T

The invention consists in the novel parts, and in the combinations and arrangements thereof, which are defined in the appended claims; and of which one embodiment is exemplified in the accompanying drawings,

Figure 3 is a vertical section, taken along the-line 3-3 of Figure 2.

Figure 4 is a side elevation of abank' grader embodying my invention.

Figure 5 is an enlarged side elevation of the head of one of my spuds. 'Figure -6 is a correspondingly enlarged plan view of the right half of said head, the left half being symmetrical.

In view of the U. S. patent, above referred to, I deem it unnecessary to explain the working of my bank grader or to number and describe its elements, except insofar as they differ from those of the patent. For sim-.

plicity in comparing, I shall beg-in my numbering at a number. above the highest used in the patent. a r

' The chief difi'erences between my device and thedevice of the patent, lie in my employing two series of rollers 61 and 62, in place of the tracks 13 and 1a of the patent; and inmy employing a certain sort of .spuds :(to be now T 12 of the patent, which also enables me to use a longer and hence more stable scow tha that of the patent;

Oneach end of the shore side of myscow- 10, there is mounted a swiveling bracket 63. This bracket does not have to be very readily swivelable, as in practice-it is rotated only slightly (as shown by the dotted positions of the spud in Figure 1), so as to resist the effect of the current. As the brackets and the rest of the associated mounting are identical, they are numbered in only one of the two places in-which they occur in Figur 1. On thisbracket are mounted two vertical sheaves 64s and. 65, and a horizontal pivot 66 for a corresponding bracket 67 on the under side of a carriage 68. In this carriage, on rollers 69 and 70, slides the spud arm 71.

described) in place ofthe pontoons 11 and The horizontal pivot- .66 carries two sheaves 72 and 73.

sheave 78 on the front end of the handle 71, and back to an anchorage on the carriage 68. These two ropes thus serve to thrust and to retract the spud.

The desired angularity of the spud in a horizontal plane ismaintained by two lines 7 9 and 80, moored'to two cleats 81 and 82 on the deck.

As the head of the spud will greatly overbalance the, rear end of its handle, when thrust out, there is provided an A-frame 83, and a line 84, which passes from an anchorage 85 over a sheave 86 at the apex of the A-frame 83," to a winch drum'92. Whenthe rear end of the spud overbalances the front end,the rear end is supported on a roller. 87-,mounted= ontwo brackets '88 and.89.

The hea'd90 of the spud is detailediin-gFigures 5 and 6. It is large and hollow, so as to fioat,and is provided with a sharp lip-91 to jam into the bank, as shown :in Figure 4, This lip, as shown in Figureso' and 6, may be made from a single angle-iron, convexly curved to fit the end of the spud, g I

Having now described .and illustrated one formof my invention, I wish it to be understood that my invention is not to be limited to the specific form or arrangement of parts hereinbefore described, except in so far as;

such limitations are specified in the appended claims.

'I claim: l 1 Ina spud for a'grader, the combination of: a support, swivelable about a vertical axis; means to secure the support against such-swiveling; acarriage, supported by the support, and tiltable about a horizontal axis; a handle, reciprocable in the carriage; means to reciprocate the handle and a bank-engaging head, carried by the handle.

2. In a spud for a grader, the combination 'of: asupport, swivelable abouta vertical v 1 the handle.

3. In a spud for a grader, the combination of; a support, swlvelable about a vertical axis; means to secure the support against suchswiveling; a carriage, supported by the support,'and tiltable about a horizontal axis; a handle, reciprocable in the carriage; a winch; an A-frame, a sheave on the A-frame, and a rope, all combining to support the front end of the carriage against tilting; and a roller, to support the rear end of the.car-

riage against tilting; means to reciprocate the handle; anda bank-engaging head, carried by the handle.

4, Inaspud for a grader, the combination of: a support, 'swivelable about a vertical axis; means to secure the support against such swiveling; a carriage, supported by the support, and tiltable about a horizontal axis; a handle, reciprocable in the carriage; means to reciprocate the handle; and a bank-engag ing;head,carriedby the handle, said head being buoyant and provided with a's'harp lip forengaging the bank. i

5. Ina spud for a grader, the combination ofjz, ajsupport, 'swivelable' about a vertical axis means to secure the support againsts'uch swiveling; a carriage, supported by the support, and tiltable about a horizontal axis; a handle, reciprocable in the carriage; means for I supportingeach" end of the carriage *against tilting; means to reciprocate the handle; and a' bank-engaging head, carried ,by the handle, said headbeing buoyant andprovided with a sharp lip for engaging the bank. 6. In a spud .for a grader, the combination of: a support, swivelable about a vertical axis means to secure the support againstsuch swiveling; a carria'ge, supported bythe support,'andtiltable about a horizontal axis; a handle, reciprocable in the carriage; a winch; an A-frame, a sheave ontlie A-frame, and a rope, all combiningto support the front end of the carriage against tilting; a roller, to supportthe rear end of the carriage against tilting; means to reciprocate the handle; anda bank-engaging head, carried by the handle, said headbeing buoyant and provided with a sharp lip for-F engaging the bank.

7. Ina spud for agrader, the combination of: supporting means; a handle reciprocable with respect to such supportingmeans means for reciprocating the handle, and for holding itagainst reciprocation; means for swinging the handle horizontally, and for holding it againstsuch swinging; means for tilting the handle vertically, and for holding it against such tilting; a buoyant head carriedlb the handle; and a cutting lip carriedby-the ead,

for engagement with the bank.

r 8. In a spud fora grader, the combination of: a handle, a buoyant head, carried by the handle, and having its-surface, furthestfrom the handle, convexly curved; and: anangleiron, curved to fitsuchsurface,and secured thereto in a substantiallyhorizontal for engagementwith thebank. V V

9. In a spud for a grader, thecombination plane,

for engagement with. the bank.

In testimony whereof I aflix my signature.

' WERNER LEI-IMANL a of: a handle; a hollow head, carried by the p 

